I recently moved to a new LOFT and have been spending a lot of time furniture shopping. LA is a great place for that with tons of options. Robertson and Beverly Blvd have great stores, but are on the expensive side. LA Brea also have some good options a bit more affordable. The stores below is where I got most of my stuff and have options that will look good in any LOFT without breaking the bank. The picture is from my home office.
BLUE PRINT
http://www.blueprintfurniture.com
MODANI
http://www.modani.com
VIESSO
http://www.viesso.com
BOCONCEPT
http://www.boconcept.com